XY, XZ and YZ distributions of fundamental-mode and first-overtone Cepheids. The left panels show the XY distributions of different sub-samples. The middle panels show the XZ distributions of different sub-samples. The right panels show the YZ distributions of different sub-samples. The convention of z-axis is such that the +ve z-axis represents the direction towards the observer and the –ve z-axis represents the direction away from us. The density contours are overplotted in all the panels.